RM35X0E _58 Vehicle Interior _079257 SUPPLEMENTAL RESTRAINT SYSTEMS _0387732 AIRBAG SYSTEM(for Type A) C

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM(for Type A)  B1617  Front Airbag Sensor Lost Communication (LH)  B1618  Front Airbag Sensor LH Initialization  


DESCRIPTION

The front airbag sensor LH circuit consists of the airbag sensor assembly and front airbag sensor LH.

The front airbag sensor LH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the SRS should be deployed.

These DTCs are stored when a malfunction is detected in the front airbag sensor LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1617 Front Airbag Sensor Lost Communication (LH) One of the following conditions is met:
·

The airbag sensor assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front airbag sensor LH circuit for 2 seconds.

·

A front airbag sensor LH malfunction.

·

An airbag sensor assembly malfunction.


·

Instrument panel wire

·

Engine room main wire

·

Front airbag sensor LH

·

Airbag sensor assembly


Comes on Not applicable
B1618 Front Airbag Sensor LH Initialization One of the following conditions is met:
·

The airbag sensor assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front airbag sensor LH circuit for 2 seconds.

·

A front airbag sensor LH malfunction.

·

An airbag sensor assembly malfunction.


·

Instrument panel wire

·

Engine room main wire

·

Front airbag sensor LH

·

Airbag sensor assembly


Comes on Not applicable

WIRING DIAGRAM

C414007
1.302,0.885 1.656,1.042 0.354,0.156 10 false +SL 1.313,2.063 1.667,2.219 0.354,0.156 10 false -SL 1.76,0.802 2.115,0.958 0.354,0.156 10 false 2 1.75,1.958 2.104,2.115 0.354,0.156 10 false 1 3.521,0.698 3.771,0.917 0.25,0.219 10 false 3 3.438,0.917 3.823,1.115 0.385,0.198 10 false AN7 3.469,1.125 3.823,1.281 0.354,0.156 10 false +SL 3.521,1.865 3.802,2.073 0.281,0.208 10 false 4 3.448,2.094 3.802,2.25 0.354,0.156 10 false AN7 3.469,2.302 3.823,2.458 0.354,0.156 10 false -SL 0.302,2.802 0.656,2.958 0.354,0.156 10 false A12 0.292,2.979 2.125,3.208 1.833,0.229 10 false Front Airbag Sensor LH 5.292,0.802 5.51,0.99 0.219,0.188 10 false 30 5.292,1.958 5.521,2.135 0.229,0.177 10 false 31 5.615,0.917 5.969,1.073 0.354,0.156 10 false +SL 5.615,2.083 5.969,2.24 0.354,0.156 10 false -SL 5.49,2.813 5.844,2.969 0.354,0.156 10 false N45 5.51,2.979 7.042,3.281 1.531,0.302 10 false Airbag Sensor Assembly

PROCEDURE

1.CHECK CONNECTION OF CONNECTORS
a.

Turn the ignition switch off.


b.

Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.


c.

Check that the connectors are properly connected to the airbag sensor assembly and front airbag sensor LH.


Result:
Proceed to
The connectors are properly connected
The connectors are not properly connected



The connectors are properly connected

2.CHECK CONNECTORS

The connectors are not properly connected

CONNECT CONNECTORS PROPERLY

2.CHECK CONNECTORS
a.
C208241C39
0.573,1.458 0.771,1.625 0.198,0.167 10 false *1 2.635,1.552 2.833,1.719 0.198,0.167 10 false *2 1.271,1.25 1.469,1.417 0.198,0.167 10 false *3 1.719,1.271 1.917,1.438 0.198,0.167 10 false *4
*1 Front Airbag Sensor LH
*2 Airbag Sensor Assembly
*3 Engine Room Main Wire
*4 Instrument Panel Wire


Disconnect the connectors from the airbag sensor assembly and front airbag sensor LH.


b.

Check that the connectors (on the airbag sensor assembly side and front airbag sensor LH side) are not damaged.


Result:
Proceed to
The connectors are not deformed or damaged
The connectors are deformed or damaged



The connectors are not deformed or damaged

3.CHECK FRONT AIRBAG SENSOR LH CIRCUIT

The connectors are deformed or damaged

REPLACE INSTRUMENT PANEL WIRE OR ENGINE ROOM MAIN WIRE

3.CHECK FRONT AIRBAG SENSOR LH CIRCUIT
a.
C416729C01
1.146,3.417 1.656,3.646 0.51,0.229 0.24,0.781 0.75,1.01 0.51,0.229 0.677,1.438 0.833,1.438 0.833,1.438 1.208,0.969 true 2.063,1.458 1.896,1.458 1.896,1.458 1.531,0.958 true 1.5,3.917 1.583,3.917 1.583,3.917 2.063,4.083 true 2.167,4.083 2.833,3.75 2.833,3.75 3,3.75 true 2.313,4.396 2.5,4.5 2.5,4.5 2.583,4.5 true 0.385,2.646 0.698,2.802 0.313,0.156 10 false *1 2.854,2.729 3.167,2.885 0.313,0.156 10 false *2 1.208,2.302 1.521,2.458 0.313,0.156 10 false *3 1.833,2.313 2.146,2.469 0.313,0.156 10 false *4 2.635,4.417 2.948,4.573 0.313,0.156 10 false *5 0.25,0.24 0.563,0.396 0.313,0.156 10 false *a 1.146,3.167 1.458,3.323 0.313,0.156 10 false *b 2.375,2.104 2.531,2.302 0.156,0.198 10 false A 2.063,2.125 2.219,2.323 0.156,0.198 10 false B 1.625,2.104 1.781,2.302 0.156,0.198 10 false C 1.458,2.104 1.615,2.302 0.156,0.198 10 false D 1.021,2.125 1.177,2.323 0.156,0.198 10 false E 0.698,2.125 0.854,2.323 0.156,0.198 10 false F 2.135,1.365 2.479,1.583 0.344,0.219 10 false +SL 0.406,1.344 0.75,1.563 0.344,0.219 10 false -SL 3.063,3.677 3.406,3.896 0.344,0.219 10 false -SL 1.229,3.833 1.573,4.052 0.344,0.219 10 false +SL 1.26,3.448 1.604,3.667 0.344,0.219 10 false N45 0.375,0.813 0.719,1.031 0.344,0.219 10 false A12
*1 Front Airbag Sensor LH
*2 Airbag Sensor Assembly
*3 Engine Room Main Wire
*4 Instrument Panel Wire
*5 Service Wire
*a Front view of wire harness connector
(to Front Airbag Sensor LH)
*b Front view of wire harness connector
(to Airbag Sensor Assembly)


Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.


b.

Turn the ignition switch to ON.


c.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A12-2 (+SL) - Body ground Ignition switch ON Below 1 V
A12-1 (-SL) - Body ground Ignition switch ON Below 1 V



d.

Turn the ignition switch off.


e.

Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.


f.

Using a service wire, connect terminals 30 (+SL) and 31 (-SL) of connector B.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.



g.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A12-2 (+SL) - A12-1 (-SL) Always Below 1 Ω



h.

Disconnect the service wire from connector B.


i.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A12-2 (+SL) - A12-1 (-SL) Always 1 MΩ or higher
A12-2 (+SL) - Body ground Always 1 MΩ or higher
A12-1 (-SL) - Body ground Always 1 MΩ or higher



Result:
Proceed to
OK
NG



OK

4.CHECK FRONT AIRBAG SENSOR LH

NG

5.CHECK CONNECTORS
4.CHECK FRONT AIRBAG SENSOR LH
a.
C409320C02
0.854,1.052 1.021,1.208 0.167,0.156 10 false *1 2.375,1.135 2.542,1.313 0.167,0.177 10 false *2
*1 Front Airbag Sensor RH
*2 Airbag Sensor Assembly


Connect the connectors to the airbag sensor assembly.


b.

Interchange the front airbag sensor LH with RH and connect the connectors to them.


c.

Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.


d.

Turn the ignition switch to ON, and wait for at least 60 seconds.


e.

Clear the DTCs stored in memory.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type A)>DTC CHECK / CLEAR

Body Electrical > SRS Airbag > Clear DTCs
50002 188

f.

Turn the ignition switch off.


g.

Turn the ignition switch to ON, and wait for at least 60 seconds.


h.

Check for DTCs.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type A)>DTC CHECK / CLEAR

Body Electrical > SRS Airbag > Trouble Codes
50001 188
Result:
Proceed to
DTC B1617 or B1618 is output
DTC B1612 or B1613 is output
DTCs B1612, B1613, B1617 and B1618 are not output


HINT:

Codes other than DTC B1612, B1613, B1617 and B1618 may be output at this time, but they are not related to this check.



i.

Turn the ignition switch off.


j.

Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.


k.

Return the front airbag sensor RH and LH to their original positions and connect the connectors to them.



DTC B1617 or B1618 is output

REPLACE AIRBAG SENSOR ASSEMBLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>REMOVAL


DTC B1612 or B1613 is output

REPLACE FRONT AIRBAG SENSOR LH

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>FRONT AIRBAG SENSOR>REMOVAL


DTCs B1612, B1613, B1617 and B1618 are not output

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


5.CHECK CONNECTORS
a.
B510588C02
0.344,1.469 0.656,1.625 0.313,0.156 10 false *1 2.698,1.542 3.01,1.698 0.313,0.156 10 false *2 1.115,0.792 1.427,0.948 0.313,0.156 10 false *3 1.802,0.802 2.115,0.958 0.313,0.156 10 false *4
*1 Front Airbag Sensor LH
*2 Airbag Sensor Assembly
*3 Engine Room Main Wire
*4 Instrument Panel Wire


Disconnect the instrument panel wire connector from the engine room main wire.


b.

Check that the connectors (on the engine room main wire side and instrument panel wire side) are not damaged.


Result:
Proceed to
The connectors are not deformed or damaged
The connectors are deformed or damaged



The connectors are not deformed or damaged

6.CHECK INSTRUMENT PANEL WIRE

The connectors are deformed or damaged

REPLACE INSTRUMENT PANEL WIRE OR ENGINE ROOM MAIN WIRE

6.CHECK INSTRUMENT PANEL WIRE
a.
C416730C01
0.667,0.604 1.281,0.833 0.615,0.229 0.802,3.406 1.417,3.635 0.615,0.229 1.25,3.917 1.417,3.917 1.417,3.917 1.875,4.063 true 1.969,4.073 2.667,3.75 2.667,3.75 2.833,3.75 true 1.833,0.875 2.24,1.167 2.24,1.167 2.406,1.167 true 1.021,1.177 1.188,1.177 1.188,1.177 1.656,0.885 true 2.104,4.396 2.24,4.469 2.24,4.469 2.406,4.469 true 0.438,2.729 0.75,2.885 0.313,0.156 10 false *1 2.823,2.781 3.135,2.938 0.313,0.156 10 false *2 1.156,2.385 1.469,2.542 0.313,0.156 10 false *3 1.875,2.406 2.188,2.563 0.313,0.156 10 false *4 2.469,4.365 2.781,4.521 0.313,0.156 10 false *5 0.688,0.271 1,0.427 0.313,0.156 10 false *a 0.677,3.125 0.99,3.281 0.313,0.156 10 false *b 2.385,2.229 2.698,2.385 0.313,0.156 10 false A 2.125,2.219 2.438,2.375 0.313,0.156 10 false B 1.667,2.219 1.979,2.375 0.313,0.156 10 false C 1.396,2.229 1.708,2.385 0.313,0.156 10 false D 0.948,2.219 1.26,2.375 0.313,0.156 10 false E 0.708,2.219 1.021,2.375 0.313,0.156 10 false F 0.833,0.646 1.146,0.802 0.313,0.156 10 false AN7 0.979,3.438 1.292,3.594 0.313,0.156 10 false N45 0.979,3.833 1.292,3.99 0.313,0.156 10 false +SL 2.896,3.667 3.208,3.823 0.313,0.156 10 false -SL 0.719,1.094 1.031,1.25 0.313,0.156 10 false -SL 2.49,1.094 2.875,1.344 0.385,0.25 10 false +SL
*1 Front Airbag Sensor LH
*2 Airbag Sensor Assembly
*3 Engine Room Main Wire
*4 Instrument Panel Wire
*5 Service Wire
*a Front view of wire harness connector
(to Engine Room Main Wire)
*b Front view of wire harness connector
(to Airbag Sensor Assembly)


Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.


b.

Turn the ignition switch to ON.


c.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Switch Condition Specified Condition
AN7-3 (+SL) - Body ground Ignition switch ON Below 1 V
AN7-4 (-SL) - Body ground Ignition switch ON Below 1 V



d.

Turn the ignition switch off.


e.

Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.


f.

Using a service wire, connect terminals 30 (+SL) and 31 (-SL) of connector B.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.



g.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
AN7-3 (+SL) - AN7-4 (-SL) Always Below 1 Ω



h.

Disconnect the service wire from connector B.


i.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
AN7-3 (+SL) - AN7-4 (-SL) Always 1 MΩ or higher
AN7-3 (+SL) - Body ground Always 1 MΩ or higher
AN7-4 (-SL) - Body ground Always 1 MΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE ENGINE ROOM MAIN WIRE

NG

REPLACE INSTRUMENT PANEL WIRE